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Old 23rd October 2010, 03:44 PM   #1
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Default Regulating first stage of a First Watt amplifier

Don't know how difficult it would be to implement but so many people think it important to separate the input stage from the output stage that I have to ask the question.

I have not looked at the monumental F5 thread for quite awhile, maybe this has been discussed there.

I have a J2 which I have no complaints with but would not mind it being better.
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Old 23rd October 2010, 04:06 PM   #2
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no way , Jose , meaning on J2;

either regulating voltage for entire amp , or nothing

construction prevent that - biasing of lower output Jfet is based on neg PSU leg - so same must be common for both input and output stage

on the other side - positive leg - input stage have it in a way already regulated - with CCS
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Old 23rd October 2010, 04:59 PM   #3
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I wondered if something like that was the case but due to my third class dilettante's knowledge of electronics I had to ask and am grateful for an answer from ONE WHO KNOWS.
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Old 23rd October 2010, 05:34 PM   #4
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Quote:
Originally Posted by rickmcinnis View Post
.........ONE WHO KNOWS.


who's that ?

I had impression that only you & me were in this thread .....

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Old 23rd October 2010, 09:11 PM   #5
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I think it would work on BA2, if you want to try it.
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